CVE-2020-24986 Explained : Impact and Mitigation

Concrete5 up to and including version 8.5.2 allows Unrestricted Upload of File with Dangerous Type, such as a .php file, via File Manager, enabling the execution of arbitrary commands.

Understanding CVE-2020-24986

Concrete5 vulnerability allowing unauthorized file uploads and potential command execution.

What is CVE-2020-24986?

Concrete5 versions up to 8.5.2 are susceptible to Unrestricted File Upload, permitting the upload of malicious .php files through the File Manager, leading to arbitrary command execution.

The Impact of CVE-2020-24986

The vulnerability allows attackers to upload malicious PHP files, compromising site integrity and potentially executing unauthorized commands.

Technical Details of CVE-2020-24986

Concrete5 vulnerability details and affected systems.

Vulnerability Description

Concrete5 versions up to 8.5.2 are vulnerable to Unrestricted File Upload, enabling the upload of dangerous file types like .php, facilitating arbitrary command execution.

Affected Systems and Versions

Product: Concrete5
Vendor: N/A
Versions: Up to and including 8.5.2

Exploitation Mechanism

Attackers can manipulate site configurations to upload malicious PHP files via the File Manager, allowing them to execute arbitrary commands.

Mitigation and Prevention

Steps to mitigate and prevent CVE-2020-24986 exploitation.

Immediate Steps to Take

Update Concrete5 to the latest version to patch the vulnerability.
Restrict file upload permissions to trusted users only.
Monitor file uploads for suspicious activity.

Long-Term Security Practices

Regularly audit and review file upload permissions and configurations.
Implement file type restrictions and validation checks.

Patching and Updates

Apply security patches and updates promptly to prevent exploitation of known vulnerabilities.